Progress and recent trends in homogeneous charge compression ignition (HCCI) engines

Evaluating automobile fuel/propulsion system technologies

A method of converting nitrogen oxides in a gas to nitrogen by contacting the nitrogen oxides with a nitrogenous reducing agent in the presence of a zeolite catalyst containing at least one transition metal, wherein the zeolite is a small pore zeolite containing a maximum ring size of eight tetrahedral atoms, wherein the at least one transition metal is selected from the group consisting of Cr, Mn, Fe, Co, Ce, Ni, Cu, Zn, Ga, Mo, Ru, Rh, Pd, Ag, In, Sn, Re, Ir and Pt.

Transition metal/zeolite scr catalysts

Mobile sources critical review 1998 narsto assessment

Impact of low temperature combustion attaining strategies on diesel engine emissions for diesel and biodiesels: A review

Diesel Engines: One Option to Power Future Personal Transportation Vehicles

The purpose of the European « SPACE LIGHT» (Whole SPACE combustion for LIGHT duty diesel vehicles) 3-year project launched in 2001 is to research and develop an innovative Homogeneous internal mixture Charged Compression Ignition (HCCI) for passenger cars diesel engine where the combustion process can take place simultaneously in the whole SPACE of the combustion chamber while providing almost no NOx and particulates emissions This paper presents the whole project with the main R&D tasks necessary to comply with the industrial and technical objectives of the project The research approach adopted is briefly described It is then followed by a detailed description of the most recent progress achieved during the tasks recently undertaken The methodology adopted starts from the research study of the in-cylinder combustion specifications necessary to achieve HCCI combustion from experimental single cylinder engines testing in premixed charged conditions With such information collected, 1D CFD calculations are then used to evaluate the potential of different ways and concepts to provide the in-cylinder global conditions favourable to this combustion mode Associated 3D CFD calculations complete these results by providing information about the potential of these concepts to achieve the specified local conditions inside the combustion chamber Supported by all these calculations, by some optical diagnostics in transparent engines, by visualisation and detailed characterisation of the sprays of the new injection system developed, the design process of the most promising HCCI engine concept selected has been undertaken It is based on a unique combination of flexible variable valve actuation technology, advanced injection system with SPACE spray pattern, air and EGR charging and mixing strategies, The corresponding hardware has been manufactured and integrated in prototype single-cylinder engines The most recent engine tests results achieved with the SPACE LIGHT diesel HCCI concept are presented and discussed They already show impressive reduction of NOx and particulates as expected compared to conventional diesel combustion The most interesting aspect is that the high efficiency of the best state of the art diesel conventional combustion can be maintained It opens a promising way to future powertrain engines mixing the highest efficiency of the diesel engines with the near zero emission capability of the gasoline engine

Progress in Diesel HCCI Combustion Within the European SPACE LIGHT Project

The invention relates to a method for reducing NOX in exhaust gas flows of a motor vehicle, by means of a catalyst. Said method is characterised in that an NOX absorbing material is provided in the catalyst.

Method for improving the efficiency of reducing nox in motor vehicles

The invention concerns a regenerable particle filter for removing soot particles from exhaust gases, especially from diesel engines. In a filter housing, a ceramic filter body is arranged between an exhaust gas supply pipe and an exhaust gas discharge pipe. The filter body has a large number of channels distributed over the cross section in a honeycomb or checkerboard pattern. The channels are closed alternately at their ends so that the exhaust gas after entering into one group of channels must flow through the porous walls to the other group of channels in order then to arrive at the exhaust gas discharge pipe. Electric heating elements are arranged at the closed end of the channels open toward the exhaust gas supply pipe. Upon heating they ignite the soot particle deposit which accumulates here to an elevated degree. Since scarcely any gas flow prevails in the vicinity of the heating elements good combustion of the soot takes place and therefore a reliable regeneration of the filter.

Regenerable particle filter for the removal of soot particles from exhaust gases

An enclosed particulates filter, particularly for exhaust combustion gases, has a heat-resistant filtration element (5) containing electrically conductive rods (9), which by excitation induced via an alternating electromagnetic field applied from an external coil (7), can be heated to the ignition temperature allowing cleaning by burning-off the fouling deposit Independent claims are included for the following: (i) a combustion engine exhaust system; (ii) motor vehicles equipped with the induction system; and (iii) filter cleaning

Particulates filter for combustion gases, has wire or sintered metal filtration element cleaned by burning-off deposit, achieving ignition temperature by use of electric induction heating

Peter Zima

Papers

Diesel Engines: One Option to Power Future Personal Transportation Vehicles

Progress in Diesel HCCI Combustion Within the European SPACE LIGHT Project

Method for improving the efficiency of reducing nox in motor vehicles

Regenerable particle filter for the removal of soot particles from exhaust gases

Particulates filter for combustion gases, has wire or sintered metal filtration element cleaned by burning-off deposit, achieving ignition temperature by use of electric induction heating